Finding the Fourth Proportional to 72.56, 99.99 and 50.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72.56 : 99.99 = 50.69 : x
2. Step 2: Convert to fraction form
   72.56/99.99 = 50.69/x
3. Step 3: Cross multiply
   72.56x = 99.99 × 50.69
4. Step 4: Simplify right side
   72.56x = 5,068.74
5. Step 5: Solve for x
   x = 5,068.74/72.56
6. Step 6: Final answer
   x = 69.85